by Kelly Whiteside, USA TODAY Sports

by Kelly Whiteside, USA TODAY Sports

On the second day of Oscar Pistorius' bail hearing, questions were raised about whether a banned substance or an herbal supplement was found in his bedroom. Whatever the substance turns out to be, this much is clear: As a Paralympic medalist, Pistorius was subjected to fewer tests than an Olympic medalist in London last summer.

At the London Olympics, all top five finishers and two other athletes selected at random from each event were tested. In the Paralympics, one medalist from each event was tested, alongside random testing of other competitors.

Final arguments will be made Thursday in Pretoria, South Africa, and a magistrate will decide whether Pistorius is eligible for bail. Pistorius was charged with premeditated murder, but maintained the shooting was accidental because he mistook his girlfriend, Reeva Steenkamp, for an intruder.

During Wednesday's hearing, investigating officer Hilton Botha said police found two boxes of testosterone, which is a banned substance, and needles in the athlete's bedroom. Defense lawyer Barry Roux disputed that allegation, saying it was an "herbal substance," not a steroid or banned substance.

Later Medupe Simasiku, the spokesman for South Africa's National Prosecution Agency, told The Associated Press that it was too early to identify the substance as legal or illegal as it was still being tested.

In London, Pistorius became the first double amputee sprinter to compete in the Olympics. He finished 23rd in the 400 meters and his team was eighth in the 4x400. Since he was not a top-five finalist in his two events and not selected randomly, Pistorius wasn't tested during the Olympics, the International Olympic Committee told Agence France-Presse. More than 5,000 tests were conducted in London.

After the Olympics, Pistorius competed in the Paralympics, where he won two gold medals and a silver. He was tested on Aug. 25 and Sept. 8, International Paralympic Committee spokesman Craig Spence told USA TODAY Sports. Both tests were negative. In London, there were 1,200 tests.

At the time, the chairperson of the IPC's anti-doping committee, Jose Antonio Pascual, said analyzing samples from every medalist would be impossible because of the high number of medals (1,522 in London) awarded at the Paralympics. Spence said the IPC's budget doesn't allow for testing so many samples. At the London Olympics, there were 962 medals awarded.

Pistorius was also subjected to drug testing by his sport's governing body, the International Association of Athletics Federations. Since he was ranked 55th in the world in the 400, he competed in only two major championships â?? the world championships in 2011 and the London Olympics. He was tested at both. Since he was not a top-20 athlete and part of the normal IAAF target group, he wasn't subject to routine out-of-competition testing, IAAF spokesperson Nick Davies told USA TODAY Sports.